Hi paul;
If your Advance Canada Workers Benefit (ACWB) payments in 2023 exceed your actual entitlement on your 2023 tax return, the difference will need to be repaid. The ACWB payments (from slip RC210) are reported on line 41500, and your actual CWB credit is calculated on line 45300. If line 45300 is lower than line 41500 (or zero), the excess will reduce your refund or increase your tax payable to the CRA.